/* funds1.c -- 把结构成员作为参数传递 */
#include <stdio.h>
#define FUNDLEN 50
struct funds
{
    char bank[FUNDLEN];
    double bankfund;
    char save[FUNDLEN];
    double savefund;
};
double sum(double, double);
int main(void)
{
    struct funds stan = {
        "Garlic-Melon Bank",
        4032.27,
        "Lucky's Savings and Loan",
        8543.94};
    printf("Stan has a total of $%.2f.\n",
           sum(stan.bankfund, stan.savefund));
    return 0;
}
/* 两个double类型的数相加 */
double sum(double x, double y)
{
    return (x + y);
}